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-o posix: always recognise octals in "let" builtin

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Though the "let" builtin is not itself a POSIX standard command, it
processes standard shell arithmetic, so it should recognise octals
by leading zeros as POSIX requires if the 'posix' option is on.
This overrides the setting of the 'letoctal' option.

Note that none of this applies to the ((...)) arithmetic command,
which has always recognised leading-octal zeros and does not listen
to 'letoctal'. So setting the posix mode makes this consistent.

src/cmd/ksh93/sh/arith.c:
- When running the 'let' builtin, test that both SH_LETOCTAL and
  SH_POSIX are off before stripping leading zeros to disable octal
  number recognition.
- Cosmetic: fix spurious newline.

src/cmd/ksh93/sh.1:
- Document the change.

src/cmd/ksh93/tests/shtests:
- Make sure to disable posix mode by default for regression tests.
This commit is contained in:
Martijn Dekker 2020-09-01 07:16:51 +01:00
parent 921bbcaeb7
commit b301d41731
5 changed files with 19 additions and 10 deletions
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@ -14,6 +14,8 @@ Any uppercase BUG_* names are modernish shell bug IDs.
turned on if ksh is invoked under the name 'sh'.
For now, it:
* disables the &> redirection shorthand
* causes the 'let' arithmetic command to recognise octal numbers by
leading zeros regardless of the setting of the 'letoctal' option
2020-08-19: